For me going to the GT on insurance was 43.00 more every 6 months.
Gas mileage is strange. I get the same or slightly better driving to / from work. 23 to 24 mpg. Highway milage dropped to 25 at 70 and 26 at 55 mpg ( a 3 mpg loss to the V-6) V-6 was an auto.
Dealer offered the Gt for invoice and I took the 1500.00 rebate on top of that. I brought the v-6 for 18.5 k and got 16k for trade in. 3000 miles on it.